Countersunk Allen screw DIN 7991 M4x18-10.9 galvanized

Product detailed description

The DIN 7991 M4x18-10.9 Allen countersunk screw is a structural element designed for applications requiring a strong and reliable connection with a uniform surface. This screw is made of steel of strength class 10.9, which guarantees high tensile strength and resistance to mechanical stress. The zinc coating provides additional protection against corrosion, thereby extending the life of the component in harsh conditions.

The screw has a metric thread with a diameter of M4 and a pitch of 0.70 mm, which is standard for this type of thread. The total length of the screw is 18 mm, while the head height is 1.8 mm and the height of the conical part of the head is 2.48 mm. The diameter of the countersunk head is 8 mm, which allows it to be embedded in the material so that the surface of the joint remains flat. The angle of the countersunk head is 90°, which is typical for this type of screw and ensures optimal distribution of forces in the joint.

The 3 mm internal hexagon allows the use of an Allen key, which ensures easy assembly and disassembly. The screw meets the standards DIN 7991, ISO 10642 and ČSN 021144, which confirms its suitability for a wide range of industrial and construction applications, especially where it is necessary to ensure an aesthetic appearance and minimize the protrusion of connecting elements.